Need Documentary Recommendations

I have been on a documentary bender lately. I was looking for the "movies we can agree don't suck thread, but couldn't find it". I have watched Craigslist Joe, Cocaine Cowboys, and Queen of Versailles in the last few nights. Looking for some stuff you guys found interesting. I have seen all the 30 for 30's so those are no good.

Elephant in the Living Room King of Kong and a Fist Full of Quarters Runaway Slave (I normally hate political documentaries, but this one is amazing) Casino Jack (Awesome Movie about Jack Abramoff) Enron The Smartest Guys in the Room